since y = both, just equate them:
-x-5 = 2x+4
3x = -9
x = -3
y = -2
Too bad you didn't show your work...
Which graph best represents the solution to the following pair of equations? (1 point)
y = −x − 5
y = 2x + 4
A graph is plotted with values ranging from negative 10 to 10 on both x axis and y axis at increments of 1. Two lines having equations y is equal to negative x minus 5 and y is equal to 2 times x plus 4 are plotted. These 2 lines intersect at the ordered pair 6, 7.
(6,7)
A graph is plotted with values ranging from negative 10 to 10 on both x axis and y axis at increments of 1. Two lines having equations y is equal to negative x minus 5 and y is equal to 2 times x plus 4 are plotted. These 2 lines intersect at the ordered pair 6, negative 8.
(6,-8)
A graph is plotted with values ranging from negative 10 to 10 on both x axis and y axis at increments of 1. Two lines having equations y is equal to negative x minus 5 and y is equal to 2 times x plus 4 are plotted. These 2 lines intersect at the ordered pair negative 3, negative 2.
(-3,-2)
A graph is plotted with values ranging from negative 10 to 10 on both x axis and y axis at increments of 1. Two lines having equations y is equal to negative x minus 5 and y is equal to 2 times x plus 4 are plotted. These 2 lines intersect at the ordered pair negative 6, 7.
(-6,7)
OK, so on this problem, i got the answer (-3,-2) which is C, but when you go back and check your work, any way you work it out, the equations dont agree. Can someone please explain why this is.
4 answers
oobleck, yes I do realize that. Did you read it because I said I got that answer but when you went to check it, nothing equaled anything. I got the answer but checking the work did not support it.
Sorry if this sounded rude. Not being rude at all! :)
C:
A graph is plotted with values ranging from negative 10 to 10 on both x axis and y axis at increments of 1. Two lines having equations y is equal to negative x minus 5 and y is equal to 2 times x plus 4 are plotted. These 2 lines intersect at the ordered pair negative 3, negative 2.
(-3,-2)
so, what do you mean "nothing equaled anything"?
Plot the two lines. They intersect at (-3,-2)?
I didn't read your gibberish, because the description of the solution "equaled" perfect sense to me.
sheesh.
A graph is plotted with values ranging from negative 10 to 10 on both x axis and y axis at increments of 1. Two lines having equations y is equal to negative x minus 5 and y is equal to 2 times x plus 4 are plotted. These 2 lines intersect at the ordered pair negative 3, negative 2.
(-3,-2)
so, what do you mean "nothing equaled anything"?
Plot the two lines. They intersect at (-3,-2)?
I didn't read your gibberish, because the description of the solution "equaled" perfect sense to me.
sheesh.
1 answer